Kanai: Ambo/MoC/BoM
Jewellery: Zodiac/CoE/FoT
Weapons: Istvan’s set (push), BK set (farm).
I’m no pro though, there’s possibly a better option for the armour slot in Kanai. I’m just lazy, and it seemed a good fit.
Some high paragon peeps I saw were using Doombringer/Ambo as weapons, but I can’t remember what they were using in Kanai.
Free’s guide stickied in the Barb forums is a good place for advice on this build. He is very thorough.
This is from a couple patches ago, but no changes have been made to the build since then.